Rimac Concept_One – Electric Supercar

World’s Fastest Electric Supercar. Concept_One is an exceptional supercar with a new propulsion concept made completely in Croatia. Efficiency, extremely fast response, wide power band, compact size, regenerative braking, high torque… Those are just some advantages of our new permanent magnet synchronous motor generation which we developed exclusively for the Concept_One.

Our unique powertrain is divided into four sub-systems, each consisting of one motor, inverter and reduction gearbox. Each of those systems drives one wheel, completely independent one from the other. Sophisticated ECUs control each of those systems using the input of many precise sensors placed all over the car. This architecture allows a new approach to vehicle dynamics. We call it – All Wheel Torque Vectoring (AWTV).

Each wheel can independently accelerate or decelerate hundreds of times per second, helping to achieve the desired (driver selectable) handling. Together with the very low center of gravity, extremely high torque available almost from zero RPM and the lack of shift interruptions, the Concept_One delivers a completely new driving experience.

13.05.2013. Finished product

Rimac Automobili d.o.o.

Address: Ljubljanska 7, 10431 Sveta Nedelja, Croatia

Email:
General enquiries: info@rimac-automobili.com
Press: press@rimac-automobili.com

Tel: +385 1 563 4592
Fax: +385 1 333 6698

Web: www.rimac-automobili.com

We need:
- Financing/ Investor
- Partner for business cooperation
- Technology buyer

 

Description

Even primitive (DC) electric motors can outperform any combustion engine in almost all fields. Efficiency, extremely fast response, wide power band, compact size, regenerative braking, high torque… Those are just some advantages of our new permanent magnet synchronous motor generation which we developed exclusively for the Concept_One.

Our unique powertrain is divided into four sub-systems, each consisting of one motor, inverter and reduction gearbox. Each of those systems drives one wheel, completely independent one from the other. Sophisticated ECUs control each of those systems using the input of many precise sensors placed all over the car. This architecture allows a new approach to vehicle dynamics. We call it – All Wheel Torque Vectoring (AWTV).

Each wheel can independently accelerate or decelerate hundreds of times per second, helping to achieve the desired (driver selectable) handling. Together with the very low center of gravity, extremely high torque available almost from zero RPM and the lack of shift interruptions, the Concept_One delivers a completely new driving experience.

Propulsion system

The idea was to create an exceptional supercar with a unique powertrain. The ability of controlling each wheel separately, hundreds of times per second, in both directions is a huge advantage compared to traditional sportscars. An electric motor does not know the words “lag”, or “time to change gears”. Focused on the driving experience, the Concept_One is driven by the most high-tech components of electric propulsion, developed in our cutting – edge Research and Development facilities, challenging the future of automotive development. With a curb weight of 1950 kg, and 1088 HP, the Concept_One can reach 100 km/h from standstill in 2.8 seconds and continues to accelerate over 300 km/h.

The Concept_One is designed to be the best supercar, not just a supercar with electric motors. The independent drive system and low mounted batteries are a dream came true for any engineer who wants to improve driving dynamics. We don’t use a platform which was originally developed for an internal combustion engine car – the whole Concept_One architecture is developed from scratch, around the powertrain and battery – pack. We are building an electric supercar which raises the bar. Our goal is to hand -build the best car possible, using the best available materials and components. We are especially proud of the fact that all key components are designed, engineered and produced by Rimac Automobili.

The Concept_One’s powertrain is divided into the front and rear sub – system. Each of those sub – systems contains two symmetrical motor – controller – reduction gearbox units.

Two Permanent Magnet Motors are combined in a common housing but still, they are completely independent – designed with Torque Vectoring in mind. The motors (rotor and stator) are oil cooled with a closed – loop cooling system inside the housing.

This architecture was necessary in order to get as much power as possible, while keeping the weight low.

 

Battery system

When we started to design the Concept_One there were many obstacles to tackle. One of the most difficult tasks was the energy storage. While capacity and cost are the biggest problems for most manufacturers, Rimac Automobili faced many additional challenges. We had to find a way to get as much power and energy as possible and still keep the package small, light and efficient. Our battery-module architecture has evolved during the development through many evolution stages and redesigns.

The design was optimized during lab and real-world tests in prototypes until all goals were satisfied. A very sophisticated Active Battery Management System (A – BMS) is monitoring and balancing each cell separately. The innovative Thermal Management System and A – BMS are working constantly to keep the ideal conditions for a long battery life and optimal performance.

The result is a high-performance 92 kW battery which can deliver or receive (during Regen-braking) over one Megawatt of power constantly, which makes it suitable for race-track use without thermal problems.

 

Torque Vectoring

One of the most innovative features of the Concept_One is the Rimac All Wheel Torque Vectoring System (R-AWTV), which distributes the power to each single wheel in every situation based on various input factors.

This system gives the Concept_One unique handling characteristics which can be adjusted by the driver. The driver can choose between a neutral and safe (understeer oriented) setup. Alternatively, if the driver has more skills and confidence, an oversteer setup can be chosen. This feature is not only a technological gimmick, it also improves safety since electric motors can react much faster compared to traditional stability control systems (ESP) which are using hydraulic brakes in order to influence the vehicle stability.

Together with the very low center of gravity, extremely high torque available almost from zero RPM and the lack of shift interruptions, the Concept_One delivers a completely new driving experience.

 

Design

Exterior design

Exploring the labyrinth of creativity, soon it was obvious the design had to be simple and clear with a lot of sporty elegance to easily catch up with its competitors in this power & exclusivity class.

The creation process was clearly influenced by the urge of two body colors for distinction and its compact dimension, with the goal to capture the beauty of now/today/present.Its expressive and classy side-graphic in exposed carbon indicates its production technology and materials and its lightweightness at the same time. Whereas the strong body sections in the front and rear show the mighty capabilities in performance. This and the combination of refined details give this fast car its distinctive and special appearance, which is just the beginning of the story.

Interior design
A hyper car does not have to be unpleasant. It must welcome the driver not only with comfort and luxury but also with great ergonomics that suits its superb performance character. That is why the interior of the Rimac Concept_One is driver-focused, seamlessly integrated into the car. The cabin tailors itself perfectly around the driver, while the high-end infotainment system keeps you entertained and informed about the vehicle’s systems.
The interior is designed by a team of former Pininfarina employees, led by Mr. Goran Popović.

 

Specifications

Performance

  • Power output: 1088 hp
  • Torque: 1600 Nm from 0 to 6500 rpm
  • Acceleration: 0-100 km/h (0-62 mph) 2,8 seconds
  • Range: up to 600 km (realistic range – 500 km)
  • Braking distance: 31.5m (100-0 km/h)
  • Lateral g-force: 1.4 g
  • Efficiency: 140-550 Wh/km
  • 40 kW on-board charging
  • 100 kW fast DC-charging
  • Weight-to-power ratio: 1.79 kg/hp
  • Weight distribution: 42% front, 58% rear

Dimensions

  • Total length: 4548 mm
  • Total width: 1997 mm
  • Total height: 1198 mm
  • Ground clearance: Rear: 115 mm, Front: 105 mm
  • Wheelbase: 2750 mm.
  • Dry weight: 1950 kg

Battery-Pack

  • Lithium-Iron-Phosphate (LiFePO4) chemistry
  • Configuration: 1400 cells – 200 series, 7 parallel
  • Voltage: 650V nominal
  • Capacity: 91 kWh
  • Cooling: Freon (gas) with high-voltage heat pumps
  • Milled aluminum and sheet aluminum housing
  • Rimac Automobili Active Battery and Thermal Management Systems
  • Several layers of redundant safety and protection systems

Chassis

  • Carbon fibre monocoque with integrated battery-pack
  • Carbon fibre sub-frames (front and rear)
  • Carbon fibre crash structure
  • Front and rear suspension: Double wishbones, fully adjustable, pushrod operated.
  • Electronically adjustable ride height.
  • Fully machined aluminum uprights and wishbones
  • Propulsion System
  • Rear: Rimac Automobili D-PM-OC-600 – high speed dual permanent magnet oil cooled motors, 600 kW peak,
  • 10.000 RPM, up to 97% efficiency
  • Front: Rimac Automobili D-PM-OC-400 – high speed dual permanent magnet oil cooled motors, 400 kW peak,
  • 10.000 RPM, up to 97% efficiency
  • Dry sump lubrication
  • Milled aluminum housings
  • Reduction gearbox ratio: 3,5

Steering

  • Rack and pinion electrically power assisted steering.
  • Brakes
  • Front brakes: Ventilated ceramic discs Ø 390 mm, 36 mm wide.
  • 6-piston calipers, power-assisted.
  • Rear brakes: Ventilated ceramic discs Ø 380 mm, 34 mm wide.
  • 4-piston calipers, power-assisted.
  • Up to 800 kW of regen-braking (adjustable)

Safety Systems

  • Front and side air-bags
  • ABS
  • Torque Vectoring with stability function
  • Safety disconnect systems in case of crash
  • Multiple ECU architecture for monitoring of safety-relevant electronic systems

Body

  • Full carbon-fibre body.

 

About innovator

Focused on high-performance that comes from a unique fusion of light build, and pure, seamless power, Rimac Automobili was driven from the world we were, passionate petrolheads, into the world of electric propulsion that we are today.

Rimac Automobili is a family of enthusiasts, engineers and designers on their quest to discover new ways of making cars faster, and to prove to the World that fun can be electric – far more than anyone ever imagined. Located in Croatia, near Zagreb, the Rimac factory is a place where magic has happened since 2009. When you love what you do, you don’t work, you play and thus create art.

We started by improving cars, today, we revolutionize them. High-performance, light weight, efficient and top quality with no compromises.

Guided by passion and open minded ideas, Rimac Automobili develops and produces high-performance electric vehicles, drivetrains and battery systems.

Rimac Automobili Team

 

 

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